CN111719447A - Novel hyperbolic arch bridge deck widening and reinforcing method - Google Patents
Novel hyperbolic arch bridge deck widening and reinforcing method Download PDFInfo
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- CN111719447A CN111719447A CN202010760583.3A CN202010760583A CN111719447A CN 111719447 A CN111719447 A CN 111719447A CN 202010760583 A CN202010760583 A CN 202010760583A CN 111719447 A CN111719447 A CN 111719447A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0808—Cleaning containers having tubular shape, e.g. casks, barrels, drums by methods involving the use of tools, e.g. by brushes, scrapers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a novel method for widening and reinforcing a bridge deck of a double-arch bridge, which comprises the steps of dismantling a bridge deck on the original double-arch bridge, cleaning and planing off arch fillers on the original double-arch bridge, and dismantling arch side walls on the original double-arch bridge; planting ribs between arch waves and arch ribs of the original hyperbolic arch bridge; the method comprises the following steps of respectively newly building reinforced concrete arch upper side walls on two sides of the top surface of an original double-arch bridge, and arranging pre-buried cantilever section steel on the side wall, far away from the center of the original double-arch bridge, of the newly built reinforced concrete arch upper side wall during construction; pouring bubble lightweight concrete into a cavity between the newly-built reinforced concrete arch upper side walls for filling; the invention can avoid the repeated consumption of natural resources and equipment resources caused by dismantling and rebuilding, can obviously increase the bearing performance of the bridge, and has the advantages of convenient construction, large bridge deck widening proportion, greatly improved arch rib bearing capacity and the like.
Description
Technical Field
The invention belongs to the technical field of arch bridge bridges, and relates to an arch bridge deck widening and reinforcing method, in particular to a novel hyperbolic arch bridge deck widening and reinforcing method.
Background
The double-curved arch bridge is an arch bridge type commonly adopted in China, and the bridge type has the characteristics of convenience in construction, attractive appearance, material conservation and the like, so that the double-curved arch bridge is widely constructed in a plurality of areas in China to meet the requirements of traffic and transportation industries. However, due to the increasing traffic volume, the width of the bridge deck often cannot meet the travel requirement, so widening and improvement are urgently needed; on the other hand, the design of piers and abutment of the existing arch bridges is slightly conservative during construction, the bearing capacity of the lower structure has certain margin, the self potential of the arch bridge structure is constant, and the combined action of the arch bridge and the arch building is added, namely the bearing capacity of the existing arch bridge cannot be fully exerted; correspondingly, the existing arch bridge structure is more necessary, and the existing arch bridge structure is fully utilized in the transformation process to carry out the widening and reinforcing process.
In order to solve the above problems, the current solutions generally include two types, namely new construction dismantling and widening reinforcement. For the former, as the main structure of the arch bridge is well preserved, the whole structure (especially the lower structure) has no big damage, and the bridge head conical slope and the retaining walls at the two sides of the bridge are relatively intact, the double-curved arch bridge is greatly wasted by adopting a dismantling and rebuilding mode, so that the newly-built bridge not only has large investment, but also has aesthetic property and is difficult to compare with the old bridge in coordination with the environment; for the latter, the prior art hyperbolic arch bridge deck widening reinforcement method tends to perform comprehensive reinforcement on arch waves or arch ribs, and has the disadvantages of large widening and reinforcing area, large dead load of an upper structure, high cost, complex construction and long construction time, so that optimization and improvement are needed; in addition, when widening the reinforcement to original arch bridge, need lay one deck pitch to new bridge face at last, and among the prior art, pitch is at the laying process, and it is slower to have material stirring speed in the jar, and mobility is not good, makes the material can not carry out intensive mixing, because pitch stickness is bigger, makes at the stirring in-process, has a large amount of materials to splash and the adhesion on the inner wall of heating tank, and, the material also easy adhesion is on the inner wall of heating tank when unloading, influences pitch and lays bridge floor efficiency.
Disclosure of Invention
The invention aims to solve the problems that the existing arch bridge structure usually adopts two modes of new construction and widening reinforcement, and for the former, because the main structure of the arch bridge is well preserved and the whole structure has no big damage, and simultaneously, the bridge head conical slope and the retaining walls at two sides of the bridge are relatively intact, the double-curved arch bridge is greatly wasted by adopting the mode of dismantling and reconstructing, so that the newly-constructed bridge not only has large investment, but also has aesthetic property and is difficult to compare with the old bridge in coordination with the environment; for the latter, the hyperbolic arch bridge deck widening and reinforcing method in the prior art tends to comprehensively reinforce arch waves or arch ribs, and has the problems of large widening and reinforcing area, large upper structure dead load, high cost, complex construction and long construction time; meanwhile, the construction time is short, the reinforcement construction period is convenient to control, and the cost is saved; according to the novel method for widening and reinforcing the bridge deck of the double-curved arch bridge, a large amount of repeated consumption of natural resources and equipment resources caused by dismantling and reconstruction can be avoided, the environmental pollution is reduced, and the cost is saved; by combining the structural characteristics of the double-curved arch bridge, the design, construction process steps and operation means of widening reinforcement are researched and designed, the bearing performance of the bridge can be obviously improved, bridge floor congestion is effectively relieved, traffic capacity is improved, and the double-curved arch bridge has the advantages of convenience in construction, large bridge floor widening proportion, greatly improved arch rib bearing capacity and the like, and has wide practical application prospects.
The purpose of the invention can be realized by the following technical scheme:
a novel method for widening and reinforcing a double-arch bridge deck comprises the following steps:
s1, removing a bridge deck on the original double arch bridge, cleaning and planing off arch fillers on the original double arch bridge, and removing an arch side wall on the original double arch bridge;
s2, building a construction hanger on the double-arch bottom of the original double-arch bridge;
s3, planting bars between arch waves and arch ribs of the original hyperbolic arch bridge, then binding the bars, installing a bottom die, pouring concrete, and removing the die after the strength of the concrete reaches the design strength to form a reinforced substrate;
s4, respectively newly building reinforced concrete arched upper side walls on two sides of the top surface of the original double-arch bridge, and arranging pre-buried cantilever steel sections on the side walls of the newly built reinforced concrete arched upper side walls, which are far away from the center of the original double-arch bridge, during construction of the newly built reinforced concrete arched upper side walls;
s5, after the construction of the newly-built reinforced concrete arch upper side walls is finished, pouring bubble lightweight concrete in cavities among the newly-built reinforced concrete arch upper side walls for filling;
s6, erecting a new bridge deck on the top surfaces of the pre-buried cantilever section steel, the newly-built reinforced concrete arch upper side wall and the bubble lightweight concrete, binding the new bridge deck with reinforcing steel bars, and integrally pouring the new bridge deck and the pre-buried cantilever section steel;
s7, newly-built cantilever beams are arranged on the bottom surfaces of the newly-built reinforced concrete upper arch side walls and the new bridge deck, asphalt bridge decks are paved on the new bridge deck, anti-collision guardrails are newly built on two sides of the new bridge deck, and the overhanging bottom die and the hanging bracket are detached through a bridge inspection vehicle.
Preferably, in S3, the bottom mold is suspended and fixed on the ribs and waves of the original hyperbolic arch bridge, and the reinforcing base is provided with a reserved cavity.
Preferably, in S4, when the newly-built reinforced concrete arch upper side wall is constructed, a first expansion joint and a first contraction joint are respectively arranged along the horizontal extension direction of the newly-built reinforced concrete arch upper side wall, the first expansion joint is arranged on a pier and a bench top of the original hyperbolic arch bridge, and the first contraction joint is arranged at a mid-span position of the original hyperbolic arch bridge;
the embedded overhanging type steel is a bottom die bearing structure of a newly-built cantilever beam between a newly-built reinforced concrete arch upper side wall and the bottom surface of a new bridge deck, and the embedded overhanging type steel is a bottom die bearing structure of an overhanging part on the new bridge deck.
Preferably, when the new bridge deck is constructed, a second expansion joint and a second contraction joint are respectively arranged along the horizontal extending direction of the new bridge deck, the second expansion joint is arranged on the pier and the bench top of the original double-arch bridge, and the second contraction joint is arranged at the midspan position of the original double-arch bridge.
Preferably, in S7, adding asphalt into the heating tank through the charging opening, then starting the stirring motor to rotate the main stirring shaft and the main stirring paddle on the main stirring shaft, so that the main stirring paddle stirs the middle material in the heating tank, and simultaneously, the main stirring shaft drives the side stirring shaft to rotate, and the side stirring shaft drives the scraping plate and the side stirring paddle to rotate, so that the scraping plate clears the asphalt material adhered to the inner wall of the mixing cavity, and simultaneously, the side stirring paddle stirs the edge material in the heating tank; then the pitch after the stirring is transported through the conveying pump, in entering into the flow distribution plate along the unloading pipe, spout new bridge deck board from spouting the material pipe again on, simultaneously, promote pitch laying truck and remove along new bridge deck board for the coating roller on the support frame evenly coats pitch on new bridge deck board, thereby has improved pitch coating efficiency greatly, makes pitch can evenly coat on new bridge deck board.
Preferably, the asphalt paving vehicle includes the heating tank, a supporting rack, the gyro wheel, the installation pole, the coating roller, the flow distribution plate, spout the material pipe, the conveying pump, the unloading pipe, the compounding chamber, the heating tank is installed on top surface one side of support frame, the bottom of support frame is provided with the gyro wheel, the top surface of heating tank is provided with the charge door, and the bottom of heating tank is provided with the discharge gate, the discharge gate passes through unloading pipe and flow distribution plate intercommunication, be provided with the conveying pump on the unloading pipe, the conveying pump is installed on the support frame, the bottom surface of flow distribution plate evenly is provided with the material pipe that spouts of multiunit, the both sides of support frame are vertical respectively to be provided with the installation pole.
Preferably, a cylindrical mixing cavity is arranged in the heating tank, a stirring mechanism is arranged in the mixing cavity, the stirring mechanism comprises a stirring motor, a main stirring shaft, a side stirring shaft, a scraping plate, a side stirring paddle and a main stirring paddle, the stirring motor is arranged on the outer wall of the heating tank, the output end of the stirring motor is connected with one end of the main stirring shaft, the other end of the main stirring shaft extends into the mixing cavity, the main stirring shaft is rotatably connected with the heating tank, a plurality of groups of main stirring paddles are equidistantly arranged on the outer wall of the main stirring shaft, two groups of side stirring shafts are symmetrically arranged on the outer wall of the main stirring shaft, the side stirring shafts are of an L-shaped structure, the scraping plate and the side stirring shaft are respectively arranged on two sides of the horizontal part of the side stirring shaft, the scraping plate is positioned on one side of the side stirring shaft close to the inner wall of the mixing cavity, the scraping plate, the side stirring shaft is positioned on one side of the side stirring shaft away from the inner wall of the material mixing cavity, and a plurality of groups of side stirring shafts are arranged at equal intervals.
Compared with the prior art, the invention has the beneficial effects that: the arch rib on the original double-arch bridge is reinforced, the double-arch bridge is transformed into a hollow plate arch, the stress of the arch rib and arch waves on the original double-arch bridge is improved, the bearing capacity of the arch rib is improved, and the increase of the dead load is controlled; dismantling the bridge deck and the arch building on the original hyperbolic arch bridge, and newly building reinforced concrete side walls and bubble lightweight concrete arch fillers to reduce the dead load of the upper structure; then, the scheme of newly building a cantilever beam and a new bridge deck with integrally widened width is adopted to realize the widening of the bridge deck, and the construction process is relatively simple, convenient to construct, good in integrity and good in reinforcing effect; meanwhile, the construction time is short, the reinforcement construction period is convenient to control, and the cost is saved; according to the novel method for widening and reinforcing the bridge deck of the double-curved arch bridge, a large amount of repeated consumption of natural resources and equipment resources caused by dismantling and reconstruction can be avoided, the environmental pollution is reduced, and the cost is saved; by combining the structural characteristics of the double-curved arch bridge, the design of widening reinforcement, the construction process steps and the operation means are researched and designed, so that the bearing performance of the bridge can be obviously improved, the bridge floor congestion is effectively relieved, the traffic capacity is improved, and the double-curved arch bridge has the advantages of convenience in construction, large bridge floor widening proportion, greatly improved arch rib bearing capacity and the like, and has wide practical application prospect;
the method solves the problems that the existing arch bridge structure usually adopts two modes of new construction and widening reinforcement, for the former, the main structure of the arch bridge is well preserved, the whole structure has no big damage, simultaneously, the bridge head conical slope and the retaining walls at two sides of the bridge are relatively intact, and the double-curved arch bridge is greatly wasted by adopting the mode of dismantling and rebuilding, so that the newly-constructed bridge has large investment, and the coordination of the attractiveness and the environment is difficult to compare with the old bridge; for the latter, the bridge deck widening and reinforcing method of the double-curved arch bridge in the prior art tends to comprehensively reinforce arch waves or arch ribs, and has the problems of large widening and reinforcing area, large dead load of an upper structure, high cost, complex construction and long construction time;
the asphalt paving vehicle can greatly improve the efficiency of stirring and mixing asphalt raw materials, and solve the problems that in the prior art, a group of stirring shafts are usually adopted for stirring, so that the stirring speed of materials in the tank is low, the fluidity is poor, and the materials cannot be fully stirred; the flitch is scraped in the setting and has been solved prior art, because pitch viscosity is bigger for at the stirring in-process, there is a large amount of materials to splash and the adhesion on the inner wall of heating jar, and, the material also easy adhesion when unloading is on the inner wall of heating jar, influences the problem that the bridge floor efficiency was laid to pitch.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an original hyperbolic arch bridge of the invention.
FIG. 2 is a schematic structural diagram of the original hyperbolic arch bridge deck after widening and reinforcing.
Fig. 3 is a schematic perspective view of an asphalt paving vehicle according to the present invention.
Fig. 4 is a bottom view of the asphalt paving vehicle of the present invention.
FIG. 5 is a schematic view of the interior of the mixing chamber of the present invention.
In the figure: 1. a heating tank; 2. a feed inlet; 3. a support frame; 4. a roller; 5. mounting a rod; 6. a coating roller; 7. a flow distribution plate; 8. a material spraying pipe; 9. a delivery pump; 10. a discharging pipe; 11. a mixing chamber; 12. a stirring motor; 13. a main stirring shaft; 14. a side stirring shaft; 15. a scraping plate; 16. a side stirring paddle; 17. and a main stirring paddle.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a new method for widening and reinforcing a deck of a hyperbolic arch bridge includes the following steps:
s1, removing a bridge deck on the original double arch bridge, cleaning and planing off arch fillers on the original double arch bridge, and removing an arch side wall on the original double arch bridge;
s2, building a construction hanger on the double-arch bottom of the original double-arch bridge;
s3, planting bars between arch waves and arch ribs of the original hyperbolic arch bridge, then binding the bars, installing a bottom die, pouring concrete, and removing the die after the strength of the concrete reaches the design strength to form a reinforced substrate;
s4, respectively newly building reinforced concrete arched upper side walls on two sides of the top surface of the original double-arch bridge, and arranging pre-buried cantilever steel sections on the side walls of the newly built reinforced concrete arched upper side walls, which are far away from the center of the original double-arch bridge, during construction of the newly built reinforced concrete arched upper side walls;
s5, after the construction of the newly-built reinforced concrete arch upper side walls is finished, pouring bubble lightweight concrete in cavities among the newly-built reinforced concrete arch upper side walls for filling;
s6, erecting a new bridge deck on the top surfaces of the pre-buried cantilever section steel, the newly-built reinforced concrete arch upper side wall and the bubble lightweight concrete, binding the new bridge deck with reinforcing steel bars, and integrally pouring the new bridge deck and the pre-buried cantilever section steel;
s7, newly-built cantilever beams are arranged on the newly-built reinforced concrete arch upper side wall and the bottom surface of a new bridge deck, an asphalt bridge deck is laid on the new bridge deck, anti-collision guardrails are newly built on two sides of the new bridge deck, a cantilever bottom die and a hanging bracket are removed through a bridge inspection vehicle, the double-curved arch is transformed into a hollow plate arch by reinforcing the arch rib on the original double-curved arch bridge, the stress of the arch rib and the arch wave on the original double-curved arch bridge is improved, the bearing capacity of the arch rib is improved, and the increase of the constant load is controlled; dismantling the bridge deck and the arch building on the original hyperbolic arch bridge, and newly building reinforced concrete side walls and bubble lightweight concrete arch fillers to reduce the dead load of the upper structure; then, the scheme of newly building a cantilever beam and a new bridge deck with integrally widened width is adopted to realize the widening of the bridge deck, and the construction process is relatively simple, convenient to construct, good in integrity and good in reinforcing effect; meanwhile, the construction time is short, the reinforcement construction period is convenient to control, and the cost is saved; according to the novel method for widening and reinforcing the bridge deck of the double-curved arch bridge, a large amount of repeated consumption of natural resources and equipment resources caused by dismantling and reconstruction can be avoided, the environmental pollution is reduced, and the cost is saved; by combining the structural characteristics of the double-curved arch bridge, the design, construction process steps and operation means of widening reinforcement are researched and designed, the bearing performance of the bridge can be obviously improved, bridge floor congestion is effectively relieved, traffic capacity is improved, and the double-curved arch bridge has the advantages of convenience in construction, large bridge floor widening proportion, greatly improved arch rib bearing capacity and the like, and has wide practical application prospects.
In S3, a bottom die is suspended and fixed on the arch ribs and the arch waves of the original double-arch bridge, a reserved cavity is arranged on the reinforcing base, the bottom die is suspended and fixed on the arch ribs and the arch waves of the original double-arch bridge, and the reserved cavity in the reinforcing base is reinforced for reducing the constant load of the structure in the later period, reducing the concrete pouring square amount and the self weight.
In S4, when the newly-built reinforced concrete arch upper side wall is constructed, a first expansion joint and a first contraction joint are respectively arranged along the horizontal extension direction of the newly-built reinforced concrete arch upper side wall, the first expansion joint is arranged on a pier and a bench top of the original hyperbolic arch bridge, and the first contraction joint is arranged at the midspan position of the original hyperbolic arch bridge; the expansion joint is arranged on the newly-built reinforced concrete arch upper side wall, the expansion joint can prevent the newly-built reinforced concrete arch upper side wall from being crushed or arched at the edge of the contraction joint when the temperature rises, and the contraction joint can prevent the newly-built reinforced concrete arch upper side wall from generating irregular cracks and being arranged when the temperature is reduced.
The embedded overhanging type steel is a bottom die bearing structure of a newly-built cantilever beam between a newly-built reinforced concrete arch upper side wall and the bottom surface of a new bridge deck, and the embedded overhanging type steel is a bottom die bearing structure of an overhanging part on the new bridge deck.
When the new bridge panel is constructed, a second expansion joint and a second contraction joint are respectively arranged along the horizontal extending direction of the new bridge panel, the second expansion joint is arranged on a pier and a bench top of an original double-arch bridge, the second contraction joint is arranged at the midspan position of the original double-arch bridge, through arranging the expansion joint on the new bridge panel, the expansion joint can prevent the new bridge panel from being crushed or arched at the edge of the contraction joint when the air temperature rises, and the contraction joint can prevent the new bridge panel from generating irregular cracks and setting the contraction joint when the air temperature falls.
In S7, adding asphalt into the heating tank 1 through the charging hole 2, then starting the stirring motor 12 to work, driving the main stirring shaft 13 and the main stirring paddle 17 on the main stirring shaft 13 to rotate, so that the main stirring paddle 17 stirs the middle material in the heating tank 1, meanwhile, the main stirring shaft 13 drives the side stirring shaft 14 to rotate, the side stirring shaft 14 drives the scraping plate 15 and the side stirring paddle 16 to rotate, so that the scraping plate 15 cleans the asphalt material adhered to the inner wall of the mixing cavity 11, and meanwhile, the side stirring paddle 16 stirs the edge material in the heating tank 1; then the pitch after the stirring is transported through conveying pump 9, enters into flow distribution plate 7 along unloading pipe 10 in, spouts new decking from spouting material pipe 8 again on, simultaneously, promotes the asphalt paving vehicle and removes along new decking for coating roller 6 on the support frame 3 evenly coats pitch on new decking, thereby has improved pitch coating efficiency greatly, makes pitch can evenly coat on new decking.
Asphalt paving vehicle includes heating tank 1, support frame 3, gyro wheel 4, installation pole 5, coating roller 6, flow distribution plate 7, spout material pipe 8, delivery pump 9, unloading pipe 10, compounding chamber 11, heating tank 1 installs on one side of the top surface of support frame 3, the bottom of support frame 3 is provided with gyro wheel 4, heating tank 1's top surface is provided with charge door 2, and heating tank 1's bottom is provided with the discharge gate, the discharge gate passes through unloading pipe 10 and flow distribution plate 7 intercommunication, be provided with delivery pump 9 on the unloading pipe 10, delivery pump 9 installs on support frame 3, flow distribution plate 7's bottom surface evenly is provided with the material pipe 8 that spouts of multiunit, support frame 3's both sides are vertical respectively to be provided with installation pole 5, install coating roller 6 through the bolt between the two sets of installation poles 5.
A cylindrical mixing cavity 11 is arranged in the heating tank 1, a stirring mechanism is arranged in the mixing cavity 11, the stirring mechanism comprises a stirring motor 12, a main stirring shaft 13, a side stirring shaft 14, a scraping plate 15, a side stirring paddle 16 and a main stirring paddle 17, the stirring motor 12 is arranged on the outer wall of the heating tank 1, the output end of the stirring motor 12 is connected with one end of the main stirring shaft 13, the other end of the main stirring shaft 13 extends to the inside of the mixing cavity 11, the main stirring shaft 13 is rotatably connected with the heating tank 1, a plurality of groups of main stirring paddles 17 are arranged on the outer wall of the main stirring shaft 13 at equal intervals, two groups of side stirring shafts 14 are symmetrically arranged on the outer wall of the main stirring shaft 13, the side stirring shafts 14 are of an L-shaped structure, the scraping plate 15 and the side stirring shaft 14 are respectively arranged on two sides of the horizontal part of the side stirring shaft 14, the scraping plate, the scraping plates 15 are attached to the inner wall of the mixing cavity 11, the length of the scraping plates 15 is matched with that of the inner wall of the mixing cavity 11, the side stirring shafts 14 are located on one sides, far away from the inner wall of the mixing cavity 11, of the side stirring shafts 14, multiple groups of the side stirring shafts 14 are arranged at equal intervals, the efficiency of stirring and mixing asphalt raw materials can be greatly improved through the arranged asphalt laying vehicle, and the problems that in the prior art, the stirring speed of the materials at the bottom in the tank is low, the flowability is poor and the materials at the bottom cannot be fully stirred due to the fact that the materials are stirred by the arranged group of stirring shafts are solved; the flitch 15 has been solved in the prior art to the setting, because pitch viscosity is bigger for in the stirring process, there is a large amount of materials to splash and the adhesion on the inner wall of heating jar 1, and, when unloading, the material also easy adhesion influences the problem that the bridge floor efficiency was laid to pitch on the inner wall of heating jar 1.
The working principle of the invention is as follows: the arch rib on the original double-arch bridge is reinforced, the double-arch bridge is transformed into a hollow plate arch, the stress of the arch rib and arch waves on the original double-arch bridge is improved, the bearing capacity of the arch rib is improved, and the increase of the dead load is controlled; dismantling the bridge deck and the arch building on the original hyperbolic arch bridge, and newly building reinforced concrete side walls and bubble lightweight concrete arch fillers to reduce the dead load of the upper structure; then, the scheme of newly building a cantilever beam and a new bridge deck with integrally widened width is adopted to realize the widening of the bridge deck, and the construction process is relatively simple, convenient to construct, good in integrity and good in reinforcing effect; meanwhile, the construction time is short, the reinforcement construction period is convenient to control, and the cost is saved; according to the novel method for widening and reinforcing the bridge deck of the double-curved arch bridge, a large amount of repeated consumption of natural resources and equipment resources caused by dismantling and reconstruction can be avoided, the environmental pollution is reduced, and the cost is saved; by combining the structural characteristics of the double-curved arch bridge, the design of widening reinforcement, the construction process steps and the operation means are researched and designed, so that the bearing performance of the bridge can be obviously improved, the bridge floor congestion is effectively relieved, the traffic capacity is improved, and the double-curved arch bridge has the advantages of convenience in construction, large bridge floor widening proportion, greatly improved arch rib bearing capacity and the like, and has wide practical application prospect;
the method solves the problems that the existing arch bridge structure usually adopts two modes of new construction and widening reinforcement, for the former, the main structure of the arch bridge is well preserved, the whole structure has no big damage, simultaneously, the bridge head conical slope and the retaining walls at two sides of the bridge are relatively intact, and the double-curved arch bridge is greatly wasted by adopting the mode of dismantling and rebuilding, so that the newly-constructed bridge has large investment, and the coordination of the attractiveness and the environment is difficult to compare with the old bridge; for the latter, the bridge deck widening and reinforcing method of the double-curved arch bridge in the prior art tends to comprehensively reinforce arch waves or arch ribs, and has the problems of large widening and reinforcing area, large dead load of an upper structure, high cost, complex construction and long construction time;
the asphalt paving vehicle can greatly improve the efficiency of stirring and mixing asphalt raw materials, and solve the problems that in the prior art, a group of stirring shafts are usually adopted for stirring, so that the stirring speed of the materials at the bottom in the tank is low, the fluidity is poor, and the materials at the bottom cannot be fully stirred; the flitch 15 has been solved in the prior art to the setting, because pitch viscosity is bigger for in the stirring process, there is a large amount of materials to splash and the adhesion on the inner wall of heating jar 1, and, the material also easy adhesion when unloading is on the inner wall of heating jar 1, influences the problem that the bridge floor efficiency was laid to pitch.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A novel method for widening and reinforcing a double-curved arch bridge deck is characterized by comprising the following steps: the novel method for widening and reinforcing the bridge deck of the double-arch bridge comprises the following steps:
s1, removing a bridge deck on the original double arch bridge, cleaning and planing off arch fillers on the original double arch bridge, and removing an arch side wall on the original double arch bridge;
s2, building a construction hanger on the double-arch bottom of the original double-arch bridge;
s3, planting bars between arch waves and arch ribs of the original hyperbolic arch bridge, then binding the bars, installing a bottom die, pouring concrete, and removing the die after the strength of the concrete reaches the design strength to form a reinforced substrate;
s4, respectively newly building reinforced concrete arched upper side walls on two sides of the top surface of the original double-arch bridge, and arranging pre-buried cantilever steel sections on the side walls of the newly built reinforced concrete arched upper side walls, which are far away from the center of the original double-arch bridge, during construction of the newly built reinforced concrete arched upper side walls;
s5, after the construction of the newly-built reinforced concrete arch upper side walls is finished, pouring bubble lightweight concrete in cavities among the newly-built reinforced concrete arch upper side walls for filling;
s6, erecting a new bridge deck on the top surfaces of the pre-buried cantilever section steel, the newly-built reinforced concrete arch upper side wall and the bubble lightweight concrete, binding the new bridge deck with reinforcing steel bars, and integrally pouring the new bridge deck and the pre-buried cantilever section steel;
s7, newly-built cantilever beams are arranged on the bottom surfaces of the newly-built reinforced concrete upper arch side walls and the new bridge deck, asphalt bridge decks are paved on the new bridge deck, anti-collision guardrails are newly built on two sides of the new bridge deck, and the overhanging bottom die and the hanging bracket are detached through a bridge inspection vehicle.
2. The method for widening and reinforcing the bridge floor of the double-arch bridge as claimed in claim 1, wherein in S3, the bottom die is suspended and fixed on the ribs and waves of the original double-arch bridge, and the reinforcing substrate is provided with the reserved cavity.
3. The method for widening and reinforcing the bridge deck of the new hyperbolic arch bridge according to claim 1, wherein in S4, when the newly-built reinforced concrete arch top-side wall is constructed, a first expansion joint and a first contraction joint are respectively arranged along the horizontal extension direction of the newly-built reinforced concrete arch top-side wall, the first expansion joint is arranged on the pier and the bench top of the original hyperbolic arch bridge, and the first contraction joint is arranged at the midspan position of the original hyperbolic arch bridge;
the embedded overhanging type steel is a bottom die bearing structure of a newly-built cantilever beam between a newly-built reinforced concrete arch upper side wall and the bottom surface of a new bridge deck, and the embedded overhanging type steel is a bottom die bearing structure of an overhanging part on the new bridge deck.
4. The method for widening and reinforcing the bridge deck of a new hyperbolic arch bridge according to claim 1, wherein in S5, during the construction of the new deck, a second expansion joint and a second contraction joint are respectively disposed along the horizontal extension direction of the new deck, the second expansion joint is disposed on the pier and the bench top of the original hyperbolic arch bridge, and the second contraction joint is disposed at the midspan position of the original hyperbolic arch bridge.
5. The new method for widening and reinforcing the bridge floor of the hyperbolic arch bridge according to claim 1, wherein in S7, asphalt is added into the heating tank (1) through the charging opening (2), and then the stirring motor (12) is started to operate to drive the main stirring shaft (13) and the main stirring paddle (17) on the main stirring shaft (13) to rotate, so that the main stirring paddle (17) stirs the middle material in the heating tank (1), and simultaneously, the main stirring shaft (13) drives the side stirring shaft (14) to rotate, the side stirring shaft (14) drives the scraping plate (15) and the side stirring paddle (16) to rotate, so that the scraping plate (15) cleans the asphalt material adhered to the inner wall of the mixing cavity (11), and simultaneously, the side stirring paddle (16) stirs the material at the inner edge of the heating tank (1); then the stirred asphalt is transported by a material delivery pump (9), enters a flow distribution plate (7) along a discharging pipe (10), and is sprayed onto a new bridge deck from a material spraying pipe (8), and meanwhile, an asphalt laying vehicle is pushed to move along the new bridge deck, so that the asphalt is uniformly coated on the new bridge deck by a coating roller (6) on a support frame (3).
6. The new method for widening and reinforcing the bridge floor of the hyperbolic arch bridge according to claim 5, characterized in that the asphalt laying truck comprises a heating tank (1), a support frame (3), rollers (4), a mounting rod (5), a coating roller (6), a splitter plate (7), a material spraying pipe (8), a material conveying pump (9), a material discharging pipe (10) and a material mixing cavity (11), the heating tank (1) is installed on one side of the top surface of the support frame (3), the rollers (4) are arranged at the bottom of the support frame (3), the top surface of the heating tank (1) is provided with a material inlet (2), the bottom of the heating tank (1) is provided with a material outlet which is communicated with the splitter plate (7) through the material discharging pipe (10), the material conveying pump (9) is arranged on the material discharging pipe (10), the material conveying pump (9) is installed on the support frame (3), the bottom surface of the splitter plate (7) is uniformly provided with a plurality of, the two sides of the support frame (3) are respectively vertically provided with mounting rods (5), and a coating roller (6) is arranged between the two groups of mounting rods (5) through bolts.
7. The novel method for widening and reinforcing the bridge floor of the hyperbolic arch bridge according to claim 6, wherein a cylindrical mixing cavity (11) is formed in the heating tank (1), a stirring mechanism is arranged in the mixing cavity (11), the stirring mechanism comprises a stirring motor (12), a main stirring shaft (13), a side stirring shaft (14), a scraping plate (15), a side stirring paddle (16) and a main stirring paddle (17), the stirring motor (12) is installed on the outer wall of the heating tank (1), the output end of the stirring motor (12) is connected with one end of the main stirring shaft (13), the other end of the main stirring shaft (13) extends into the mixing cavity (11), the main stirring shaft (13) is rotatably connected with the heating tank (1), a plurality of groups of main stirring paddles (17) are arranged on the outer wall of the main stirring shaft (13) at equal intervals, two groups of side stirring shafts (14) are symmetrically arranged on the outer wall of the main stirring shaft (13), side (mixing) shaft (14) are L shape structure, be provided with respectively on the both sides of the horizontal part of side (mixing) shaft (14) and scrape flitch (15) and side (mixing) shaft (14), scrape flitch (15) and be located one side that side (mixing) shaft (14) are close to material mixing chamber (11) inner wall, scrape the inner wall laminating in flitch (15) and material mixing chamber (11), the length of scraping flitch (15) and the length looks adaptation of material mixing chamber (11) inner wall, side (mixing) shaft (14) are located one side that side (mixing) shaft (14) keep away from material mixing chamber (11) inner wall, side (mixing) shaft (14) equidistant being provided with the multiunit.
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| CN202010760583.3A CN111719447A (en) | 2020-07-31 | 2020-07-31 | Novel hyperbolic arch bridge deck widening and reinforcing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657515A (en) * | 2023-07-25 | 2023-08-29 | 天元建设集团有限公司 | Widening method used for bridges |
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Application publication date: 20200929 |